0.5m-1.2n+0.5m-0.8n
=(0.5m+0.5m)-(1.2n+0.8n)
=m-2n
代入得:m-2n=2.5-2*1.2
=0.1
當m=205,n=102時,求0.5m-1.2n+0.5m-0.8n的值,先化簡再計算 ,
當m=205,n=102時,求0.5m-1.2n+0.5m-0.8n的值,先化簡再計算 ,
是當m=2.n=1.2時,對不起打錯了!
是當m=2.n=1.2時,對不起打錯了!
其他人氣:662 ℃時間:2020-05-08 13:10:10
優(yōu)質(zhì)解答
我來回答
類似推薦
- 化簡{5m-3n}-{8n-2m}
- 當m=2.5,n=1.3,求5m+3n-2m-8n(先化簡,再求值)
- 如果5m=8n(n≠0)
- 先化簡,再求值:2(m+4n)^2-(m-n)^2-(m-2n)(m-8n),其中m=-1/14,n=2
- 化簡-3n+5m-[m-5(m-n)+m]
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運嗎
- 6邊長為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機械分析天平TG628A的使用說明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as